
i just want to know how the blonde dude is the way he is. im not a psychologist so dont take my word for this but he's showing heavy signs of being a psychopath. psychopaths often develop the disorder from genes and/or some sort of trauma so im wondering if its just genetics or if something really twisted happened to him during his childhood. im a little stuck with this one because his mother seems like a sweetheart (although we never know people's true colors) to the MC [insert his name here, totally forgot it] even if its not ASPD and something else, he still needs a lot of help because his behavior and responses are not of the social norm

For what I've read. People can have a generic predisposition to antisocial disorders ( they aren't really called psychopathy or sociopathy anymore) and trauma can trigger it. But it is a highly misunderstood issue, as having an antisocial disorder doesn't guarantee you'll be a criminal. The thing is, most studies done on the subject used dangerous criminals as participants so the date we have is based on them and may not represent normal people with antisocial disorder.
What I do know is he doesn't seem to show empathy. And empathy is taught so he could be a result of child abuse or simply someone who has been taught empathy. But you know, not being shown or taught empathy is a really big flag that makes me think about emotional neglect, which is sometimes consider child abuse.
Don't forget that childhood is were our brains are mostly being develop. The experiences you have at that age will literally shape your brain.
for the people confused as to why their relationship is in this current state-
mumu saw yi cheng and the girl (su ruo?? the childhood "friend" i guess) awfully close to each other in his office and getting on the bus together. mumu also noticed how late yi cheng has been coming home consistently so he kinda suspects yi cheng is cheating on him but also has faith in him and knows there is an explanation for his behavior but yi cheng just wont share what the reasoning is yet.
yi cheng is also suspicious of that shen dude, the boyfriend of the flower shop owner, yk the painter/auction/rich guy (IM SORRY LMFAO) and thinks hes plotting something and using the girlfriend and mumu in his plan. this isnt really clear but thats basically what i got from it.